Polishing machine



-uae .srares Meije.

CARL T. Brees, or Lone suecia, cALrroaNiA- i roLIsHINs MACHINE.

State of California., have invented new and useful Improvements in Polishing Machines,

f of which the following is a specification,

This invention relates to a mechanism for effecting and controlling rotation of spindlesfin electrically driven hand manipulatedirlstruinents, such as polishers, vibra,- OIS and the like, and particularly pertains to, ato0 l for shining boots, shoes and other articles l An object of this invention is to provide a simple and effective means, forxregulating the speed of spindles in hand tools of the character above referred to, by which change of speed may be accomplished by the hand holding the tool.

A,Another object is to provide a tool embodying drive shaft and a rotary spindle which a hand controlled speed regulating meQhlnisin is provided byvmeans of which thespindle may be thrust in and out, of op- Qtltive connection with the drive shaft and propelledl atvarious speeds, and in whichthe parts are compactly and conveniently arranged andso assembled that they may be, readily removed and replaced and adjustments.' easily effected.

ll/vih theforegoing and other objects in viewtheinvention conSSts of the parts and thecomhinationiand arrangement of parts hereinafter more fully described and claimed, and illustrated by'way of example in the, accompanying drawings, Vin which: Figure 1 is aview in side elevation of a tool constructed in accordancelwith my invention.

vFigure 2 is aplan view of thetoo'l with P'ibitfs broken away and with the spindle and its mounting` removed.

Figure 3 detail in vertcal Section as seenfon' the. linefS-f of Figure 2 Showing parte in elevation. Y

' More specifically, 5 indicates a tubular handle formed 0n a Cup Shaped shell 6 formf ing part of the head portion of thevtool; the, shell 6 being open on one side and adapted to Vhe closed by acover plate 7 detachably connected to fthe'shell screws 8 or other suitable fasteninge.

. Revolubly 'mounted in the handle '5 is a 9g the youter end 0f which is detachably .Specification of Letters atent. Pai-,mired Aug,15, 1922, Application tied rune 21,

leen serial No. 479,182.

-connected to a flexible `drive shaft 10 by a suitable coupling, here shown as comprising a Collar ll rigidly mounted on theshaftlO having a tongue l2 extendingv into a groove 13 on the end ofshaft9. The flexible shaft 1 9 is encased in a tube le which encompasses the collary 1l and is engaged by'a f errule 1 5 secured to the lend of the handle by i screws 1 6.y i The innerendfof the shaft 9 extends across the shell 6y and is supported in aboarflslT formed interory of thelatter, A collar 18 is fastened on the shaft 9 and abuts against thegillner end/of the handle y5 vand co-operates with the bearing 17 in holding the shaft against shifting longitudinally.

rlhe inner end portion `of the s'haftfQQhe-4 'tween the bearingl? and the collar. 1 8 is formed with flat faces 9, heingpreferably square and slidably mounted on 4this portion of the shaft is4 a friction driving wheel 19 Comprising a. hubZO with a wheelZl formed thereon, preferably provided with'a knurled perphery- The hub 20 iS formedwth an annular channel l22 vinto which extends a yoke 23 `carried, vby a Sleeve 24:1 sldably mounted 'on ar guide rod 25 carriedbythe "shell and extending parallelI tothe shaft .9.

n Connecting with thesleevelfis a 'link 2 6, the outer end lof which connects with a knurled wheel 27 revolvably mounted cny a post 28; the lrnurled wheel having a portion of its vperiphery projecting ,through a slot 4 29 inthe shell and so positioned that it may be readily engaged by the thumb of the hand graspin the handle 5, so that the vknurled wheel 2 may,bevrotatedlbyl the `thinnb to shift the sleeve 24k and the 'drive pinionl9 longitudinally oftheir A"respective mountifngs.

30 projecting' outwardly therefrom centrally in lfriction disk construction, and `which' disk is preferably ,provided y'with a leather" face.

lThe disl;k 32 is formed with a `beveled .edge 33 so that kwhen the wheel 19l is shifted to dispose its knurled peripheryl oppositev the beveled portion, as indicated in dotted llines a in Figure 3, the wheel and diskwill befout of operative engagement with each other, v

As a means for affording a roller bearing ways 35 and 36 and interposed between the disk 33 and the hub 30; the end plate being formed with a recessed portion 37 to receive the race-ways.

The outer end of the spindle 3i is designed to receive any suitable tool, here shown as comprising a polishing brush 3S, but obviously, any desired tool adapted to be rotated by the spindle may be attached theretc, according to the use the device is to be put.

The spindle is here shown as having its outer end portion tubular in form with a spring 39 arranged therein and as having a longitudinal slot 40 opening at the end of the spindle. The tool is formed with a stein 4l adapted to extend into the tubular spindle and to abut against the spring 39; a pin 42 being mounted on the stem 4l and adapted to engage a side notch 43 formed at the inner end of the slot 40 into which the pin 42 is pressed by the spring 39 to effect a substantial engagement between the stem and spindle when the pin is moved sideways from the slot into the notch.

In the operation of the invention, whenl it is desired to employ the tool, the drive shaft 10 is connected to and operated by any suitable source of power, whereby the shaft 9 and the wheel 19 thereon may be rotated continuously. When it is desired to drive the spindle 31 the wheel 19 is moved by means of the knurled wheel 27, as before described, to dispose it into engagement with the friction disk 32, as shown in Figure 3, whereupon motion will be transmitted to the spindle 31 and to the tool thereon. On initial engagement of the wheel with the friction disk the latter will be rotated at a relatively slow speed, but by advancing the wheel toward the center of the friction disk the speed of rotation of the latter will be accordingly increased, as is common to friction disk operations.

It will now be seen that the speed of rotation of the tool on the spindle may be varied to any desired speed from a condition of rest to its maximum speed by merely rolling the regulating wheel` 27 under the thumb. This feature of the invention renders it especially applicable for use on shoe shinging or polishing tools where it is desirable to operate the brush or polisher at different speeds according to the character of polish being used, for example, in using va liquid polish and applying it to the brush,

the latter should be revolved slowly toravoid spattering the polish, but when a heavy polish, such as paste is being used, the brush may be rotated at a high speed.

By providing the means for throwing the friction transmission out of operation, the

spindle may be quickly stopped, which is advantageous when it is desired to change the tool thereon.

rin important feature of my invention res in mounting the spindle and friction l' i on the cover plate, so that wear on the di I or the wheel may be vcompensated for by tightening the screws 8; thin shims 44 being interposed between the cover plate and the shell, which shims may be removed when it is desired to advance the friction disk toward the wheel by tighteningv the screwsA rlhis cover plate being readily removed and replaced, gives easy access to the working parts in the shell, so that they may be removed and replaced and with oil holes t, c, and d at the bearings p permits ready lubrication of the parts. n

While l have shown and described av specilic embodiment of my invention, I do not limit myself to the exact details of construction and arrangement of parts shown, ybut may employ such other changes and modilications as come within the scope of the appended claims without departing from the spirit of the invention.

l claim:

l. In a device of the character described, a spindle adapted to carry a tool, a friction disk on said spindle, a rotary shaft, a frictien wheel slidable on said shaft andrevolvable therewith, a thumb operable regulating wheel, and means whereby turning said wheel will shift said wheel to throw vit in and out of engagement with said disk and to move it diametrically across the face of the disk in frictional engagement therewith. l n Y 2. A. mechanism for the purpose set forth comprising, a spindle, a friction disk thereon, a rotary shaft, a friction wheel slidable on said shaft and revolvable therewith; said wheel having a hub formed with a peripherial groove, a slidable sleeve, a yoke on said sleeve extending into the groove on the hub, a thumb operable regulating wheel, and a link connecting said wheel to said sleeve whereby rotation of the regulating wheel will move said sleeve to eect shifting of said friction wheel whereby it maybe thrown in and out of engagement with said disk and moved diametrically across its face.

8.. A polishingtool comprising, ya shell, a V.

handle on said shell, a rotary shaft extending through said handle into saidshell, a cover plate on said shell, a spindle carried by said cover plate, a friction disk on said spindle, a driving wheel slidable on said shaft and revolvable therewith having a hub formed with a peripherialv channel, a guide in said shell, a member slidable on said guide having ayoke extending into the channel on the hub, a wheel having a portion of its periphery extending through the shell, and a 1.11115. conlao cover plate, a friction disk on said spindle, a

driving Wheel slidahle on said shaft and revolvable therewith arranged to contaotsaid friction disk,l means for shifting said Wheel to throw it in and 'out ofengagement With 10 'said disk and to move it across the face ofV the disk; said cover pate being adapted to v he adjusted to regulate Contact between the friction disk and the drive Wheel.,

In Witness whereof I have hereunto afflxed 15 my' signature this 13th day of June, 1921,

,CARLl T. BEGGS. 

